Estimation of Pickup Rate of Suspended Sand by Tsunami Experiment and Proposal of Pickup Rate Formula
Estimation of Pickup Rate of Suspended Sand by Tsunami Experiment and Proposal of Pickup Rate Formula
复制标题
海啸实验对悬浮沙吸附率的估算及吸附率公式的提出
DOI：
10.2208/kaigan.65.506
复制
发表时间：
2009
影响因子：
--
通讯作者：
N. Fujii
中科院分区：
文献类型：
--
作者：
M. Ikeno;T. Yoshii;M. Matsuyama;N. Fujii
根据海啸实验获得的悬浮沉积物通量的平衡来估计海底沙的拾取率（Yoshii等人，2008年）。引入了无因次粒径和无因次沉降速度两个无因次主导参数。利用这两个参数和盾构数，提出了一个新的悬沙拾取率公式。一般来说，新的拾取率公式可以再现两种沙粒尺寸的实验结果，以及先前海啸实验的拾取率（Takahashi等人，1999年）优于传统的皮卡率公式。结果表明，该公式比传统的拾取率公式能更好地再现海啸作用下港口周围海床地形的变形。
Pickup rate of seabed sand was estimated from the balance of suspended sediment flux obtained by tsunami experiment (Yoshii et al., 2008). Two nondimensional dominant parameters such as 'nondimensional sand grain diameter' and 'nondimensional settling velocity', were newly introduced. And a new pickup rate formula of suspended sand was proposed by using their two parameters and the Shield's number. Generally, the new pickup rate formula could reproduce the experimental results of two sand grain sizes, and pickup rates by the previous tsunami experiment (Takahashi et al., 1999) better than the conventional pickup rate formula. It was showed that the above formula was able to reproduce the experimental seabed topography deformation around a harbor due to tsunami better than the conventional pickup rate formula.